levent
Posts: 1589
Joined: Sat Sep 04, 2004 8:11 pm

Cracks In Window Of JAL 777

Thu Oct 28, 2004 4:32 pm

Yesterday 27 October a Japan Airlines Boeing 777 returned to Tokyo Narita after cracks appeared in one of the cockpit windows Flight 723 had 197 passengers on board and was flying to Kuala Lumpur. The cracks appeared during cruise at an altitude of 11 km in a window on the captain´s side and measured 40 to 50 cms. The plane landed safely in Tokyo and the pax were taken to Kuala Lumpur with another plane.

Here is the link to the news source, it´s in Dutch:
http://www.luchtvaartnieuws.nl/news/?id=6075
 
777ER
Crew
Posts: 9854
Joined: Fri Dec 19, 2003 5:04 pm

RE: Cracks In Window Of JAL 777

Thu Oct 28, 2004 4:37 pm

The cracks appeared during cruise at an altitude of 11 km in a window Confused
 
levent
Posts: 1589
Joined: Sat Sep 04, 2004 8:11 pm

RE: Cracks In Window Of JAL 777

Thu Oct 28, 2004 4:44 pm

What´s wrong with that? The plane was crusing at an altitude of 11 km (about 36,000 feet) and the cracks appeared in a window on the captain´s side. Sorry if the words aren´t in the correct order, but English is not my native language...
 
studentflyer
Posts: 667
Joined: Sat Sep 25, 2004 9:02 am

RE: Cracks In Window Of JAL 777

Thu Oct 28, 2004 4:52 pm

It happened to a QANTAS 763ER a few days ago (Sunday, Oct 24). The flight was operating from PER to CGK, and aircraft returned to PER. It wasn't in the news, but a relative of mine was in that flight.

As someone else mentioned in another thread, cracked windshield isn't an event, as far as emergency procedures are concerned.

Regards,
AK
 
lyzzard
Posts: 401
Joined: Sat Nov 08, 2003 11:48 am

RE: Cracks In Window Of JAL 777

Thu Oct 28, 2004 5:19 pm

Most modern aircraft windshields have up to 3 layers of glass, so there's lots of redundancy. Check this one out...

 
KDTWflyer
Posts: 786
Joined: Tue Jun 29, 2004 12:51 pm

RE: Cracks In Window Of JAL 777

Fri Oct 29, 2004 5:19 am

Lyzzard that is an amazing picture! Wow! I read in my Concorde Story book that in August, 1994, three outter window panes of the Concorde cracked at Mach 2 and 57,000ft. with no loss of pressurisation and the inner ply was taking it all! Must have been quite a sight initially to see the windows start to crack over 10 miles up.
NW B744 B742 B753 B752 A333 A332 A320 A319 DC10 DC9 ARJ CRJ S340
 
QANTAS077
Posts: 5171
Joined: Wed Jan 14, 2004 5:08 pm

RE: Cracks In Window Of JAL 777

Fri Oct 29, 2004 6:53 am

the QF 763's window was destroyed from what i heard, question going around is what the hell happend to it, apparently it was pretty bad.
 
greasespot
Posts: 2955
Joined: Sat Apr 24, 2004 10:48 am

RE: Cracks In Window Of JAL 777

Fri Oct 29, 2004 11:22 am

A cracked window is almost always a result of a I a shorted out window heat. I happens all the time.....NO Big deal. The inner panels of a window are the structural part.

YOu can dispatch an airplane with a cracked window on a MEL as long as it is just he outer and it does not obstruct a pilots view. ( meaning depends on how bad a pilot wants to get home)

It does not indicate a problem with a airplane or lack of maintenance. It just means that a wire shorted out in most cases.
GS
Sometimes all you can do is look them in the eye and ask " how much did your mom drink when she was pregnant with you?"
 
Cessna172RG
Posts: 642
Joined: Wed Aug 30, 2000 8:31 am

RE: Cracks In Window Of JAL 777

Sat Nov 06, 2004 10:57 pm

Is there any more information on this Qantas window blowing out the other day? Sorry to get off topic, but we are talking about window cracks and what not...
Save the whales...for dinner!!!
 
767-332ER
Posts: 1974
Joined: Sun Mar 18, 2001 1:20 pm

RE: Cracks In Window Of JAL 777

Sat Nov 06, 2004 11:24 pm


Greaspot, yes, you are correct, but also, it has to be fixed at the nearest station.
Twinjets...if one fails, work the other one twice as hard!!!
 
9v-svc
Posts: 1703
Joined: Sun Oct 14, 2001 5:19 pm

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 12:31 am

Any idea what's the registration of the JAL's 777 ?
Airliners is the wings of my life.
 
andrewtang
Posts: 368
Joined: Sat Jun 23, 2001 8:51 pm

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 12:45 am

Not sure which one cracked, but JA731J (773ER) replaced her. I for once won't mind if I am the passenger  Smile/happy/getting dizzy
 
4Left
Posts: 77
Joined: Sun Mar 28, 2004 12:07 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 6:39 am

"YOu can dispatch an airplane with a cracked window on a MEL as long as it is just he outer and it does not obstruct a pilots view. ( meaning depends on how bad a pilot wants to get home)"

What's a MEL???
Planes aren't busses, put service back into the air!
 
AndersNilsson
Posts: 410
Joined: Tue May 25, 2004 8:09 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 6:45 am

What is a MEL?

A Minimum Equipment List (MEL) is a list of items that may be unserviceable on a type of aircraft under certain stated conditions such as when other identified components are operating normally and weather conditions permit. It is developed from a Master Minimum Equipment List (MMEL) which is published by a regulatory authority in consultation with the aircraft manufacturer and industry.

The MEL improves aircraft utilization without compromising safe operations and thereby provides a more convenient and economic air transportation system for the public. The MMEL includes those items of equipment related to airworthiness and operating regulations and other items of equipment that the authority finds may be inoperative and yet maintain the required level of safety by appropriate conditions and limitations. A predetermination is established, at the time the MMEL is produced, of the level of safety existing with each item unserviceable based on redundancy and probability of failure.

Anders
Airliner photography is not a crime.
 
Cpt Underpants
Posts: 160
Joined: Sat May 05, 2001 10:37 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 7:39 am

Anders:

That's an excellent description of the MEL, maybe the best I've ever seen. I have to wonder if it is from the preamble in your company's document?? In any case, I hope you don't mind if I use it! I'm building a training program and I need a nice description.

A cracked, shattered or delaminated cockpit window is a pretty regular ocurrence, but there are many causes, which can include a failure in the anti-icing grid, a crack in a pane, a bird strike, or a delamination caused by a separation of the window layers.

I once heard that the windshield on the B757 is the toughest ever made, because when it was tested, the testers fired frozen turkeys at it, and had to beef it up some more to pass. In reality, the frozen part was unnecessary, as it's rare to run into a frozen bird at 15,000 ft! I don't know if this is true, but it makes a good story!
 
KLM747
Posts: 622
Joined: Mon Jan 29, 2001 2:07 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 7:46 am

I believe this is a photo of the cracked window.

http://headlines.yahoo.co.jp/hl?a=20041027-02123901-jijp-soci.view-001

Will
 
WhalePilot
Posts: 91
Joined: Sat Jun 16, 2001 12:28 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 7:46 am

Those guys are lucky that the wind didn't blow that windshield in on the crew!!!
 
jumbojim747
Posts: 2425
Joined: Sat Oct 16, 2004 8:05 pm

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 8:58 am

I don't think its a good idea to dispatch an aircraft with any cracks to the windscreen or any other part of the aircraft.

On a wing and a prayer
 
TACAA320
Posts: 7153
Joined: Fri Aug 06, 2004 3:03 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 9:04 am

I saw a picture of an A321 cracked window from AZ at A.net not long ago.
'Science without religion is lame, religion without science is blind'. Albert Einstein
 
greasespot
Posts: 2955
Joined: Sat Apr 24, 2004 10:48 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 9:12 am

Again...a Window with the outer layer cracked has not lost any structural integrity.

It is just there for Impact resistance and the heat(so you can see if it frosts up)

I have dispatched aircraft with cracked windows and will do it again. The maintenance manual says it is fine.

Sitting in the back of the airplane you would never know if the window is cracked.


GS

Sometimes all you can do is look them in the eye and ask " how much did your mom drink when she was pregnant with you?"
 
AndersNilsson
Posts: 410
Joined: Tue May 25, 2004 8:09 am

RE: Cracks In Window Of JAL 777

Sun Nov 07, 2004 9:47 am

Cpt Underpants, I forgot to write that the description of MEL was a citation
from Transport Canada, Civil Aviation.
http://www.tc.gc.ca/CivilAviation/commerce/certification/gmel/mel.htm

Best regards

Anders Nilsson
Airliner photography is not a crime.

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